Mo. Rev. Stat. § 99.710
Assessor's statement, area covered — on file for ten years.
99.710. Assessor's statement, area covered — on file for ten years. — The city or county assessor's statement, as issued under section 99.705 , shall be the maximum total assessed valuation of all real property included in the plans, a copy of which shall remain on file in his office, for each year for a period of ten years from the date on which the statement was issued.
(L. 1973 H.B. 63 § 3, A.L. 1979 H.B. 103)